Energy Practice Test
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1 Line Master C-29 Name: Energy Practice Test Section A. Multiple Choice Questions (10 mars) Directions: Place the letter of answer that is most correct on the line provided. 1. Which energy resource is not used in Ontario? (a) fossil fuels (b) wind (c) nuclear (d) tidal 2. Which situation describes positive wor being done on a boo? (a) carrying a boo while waling forward 10 m (b) carrying a boo while waling bacward 10 m (c) carrying a boo while waling upstairs (d) carrying a boo while waling downstairs 3. A machine consumes of energy to lift a 50 g bloc 15 m. How efficient is the machine? a (a) 61 percent (b) 6 percent (c) 40 percent (d) 1 percent 4. Which of the following combinations would mae the most effective travel mug? c plastic 167 g K and c 896 a aluminum g K (a) all plastic (b) all aluminum (c) plastic inside and aluminum outside (d) aluminum inside and plastic outside 5. Which of the following is not a way solar energy can be used in your home? (a) light (b) flat-plate solar collector (c) photovoltaic cells (d) curved-plate solar collector
2 6. Which of the following is not a use of a heat pump? (a) refrigerator (b) air conditioner (c) furnace (d) air-to-air 7. A 3.0 g bloc of metal needs 6780 of energy to change its temperature by 5 C. What is the specific heat capacity of the bloc? a (a) 452 g K (b) 1356 (c) 2260 (d) 4190 g K g K g K 8. Which of the following is not a conservation rule for nuclear reactions? (a) conservation of mass-energy (b) conservation of mass (c) conservation of charge (d) conservation of nucleon number 9. What particles are emitted when thorium-230 becomes polonium-218? (a) alpha particles (b) beta particles (c) beta particles and neutrinos (d) gamma particles a 10. Which of the following is not an isotope of hydrogen? (a) 1 1 H (hydrogen) (b) 2 H (deuterium) 1 (c) 3 H (tritium) 1 (d) 4 H (quartium) 1
3 Section B. Matching Questions (10 mars) Directions: Place the letter of the choice in Column 2 next to the matching term or definition in Column 1. Column 1 Terms and Definitions 11. change in energy A. mc T Column 2 Choices 12. efficiency 13. mass-energy equivalence B. E useful E in C. 1 2 mv2 14. quantity of thermal energy D. mgh 15. amount of energy required to melt a sample 16. gravitational potential energy E. E mc 2 F. heat pump 17. inetic energy G. hydroelectric 18. particles in the nucleus of an atom 19. device that transfers thermal energy from a cooler to a warmer area 20. type of electricity generation that starts by converting gravitational potential energy into inetic energy H. nucleons I. wor. latent heat of fusion
4 Section C. Short Answer Questions (30 mars) Directions: Answer the following questions using full calculations and complete sentences. 21. A 3.0-g box is pushed up a 16-m-long ramp with a force of 40 N. If the top of the ramp is 10 m above the ground, what is the efficiency of the ramp? a 22. A boo with a mass of 1.32 g is dropped from a height of 3.2 m. How fast will the boo be travelling when it is 1.0 m above the floor? a
5 23. Compare the amount of energy consumed by sleeping (P = 83 W) for 8 h with the amount of energy consumed sitting studying (P = 210 W) for 2 h. a 24. The specific heat capacity of plastic is 167. A 132-g plastic mug at 21.2 C is filled g K with 213 g of water ( c 4190 ) at 97.8 C. Assuming that no thermal energy is lost, g K determine the final temperature of the mug and water. a
6 25. On the same set of axes, draw heating curves for raising the temperature of butter in an oven, on the counter, and in a microwave oven. c 26. Complete the paragraph below to describe the energy transfers that are occurring at each stage of the heating curve. (Art/ArtPlus Limited) The water is being heated at a constant rate, so the energy of the water is increasing at all times. As the ice is heated, the energy of the particles increases, and they vibrate faster. The temperature of the water increases. At the melting point, the bonds between the particles begin to brea, and the energy increases. Some of the water is solid and some is liquid, and the particles exchange energy. The average energy remains constant, so there is no increase in temperature. Once all the bonds have broen, the energy can t increase any more. The heating now increases the energy of the particles, and the temperature of the water starts to rise again.
7 27. Explain how a fossil-fuel power plant can be made more efficient. a 28. Compare and contrast nuclear fission and nuclear fusion. Give an example of each. 29. Lead-212 decays by two β-decays and then an α-decay. State the intermediate isotopes and the final isotope in the decay series. 30. Describe one medical use of a nuclear reaction, explaining the benefits of this application and any dangers. a
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